Tropical treat for Sir Phil

British billionaire Sir Philip Green is throwing a lavish party for his 60th birthday at a luxury resort in Mexico. Guests were not told the secret location of the bash before boarding private planes from London and Miami yesterday. They were told to arrive at a private airfield with passports and clothing for a warm-weather destination. The fortunate 150 are believed to include Simon Cowell, Kate Moss, Iranian property moguls Robbie and Vincent Tchenguiz, plus many of the jet-set crowd. Green, who is worth more than $7 billion and owns British Home Stores, Topshop and Arcadia Group, is reported to have booked Rihanna, Bruno Mars and Stevie Wonder to perform at the four- day party, at a cost of nearly $5 million. And guests have also been asked to submit their measurements, as outfits will be provided for a themed costume party. Green is well known for throwing lavish bashes — for his 50th, he dressed as Emperor Nero for a toga party in Cyprus, with Rod Stewart serenading his guests.